HomocysteineHyperhomocysteinemiaVitamin B 12Folic AcidHomocystineMethylenetetrahydrofolate Reductase (NADPH2)Cystathionine beta-SynthaseBetaine-Homocysteine S-MethyltransferaseVitamin B ComplexVitamin B 6MethionineOxidoreductases Acting on CH-NH Group Donors5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseS-AdenosylhomocysteineFolic Acid DeficiencyBetaineHomocystinuriaCystathioninePyridoxineVitamin B 12 DeficiencyS-AdenosylmethionineDietary SupplementsLipotropic AgentsPlasmaMethylmalonic AcidVitamin B 6 DeficiencyRisk Factors5,10-Methylenetetrahydrofolate Reductase (FADH2)GenotypeTetrahydrofolatesGlycine N-MethyltransferaseSarcosineCysteineVitamin B DeficiencyBiological MarkersFastingPolymorphism, GeneticCase-Control StudiesCardiovascular DiseasesPyridoxal PhosphateDietMethylenetetrahydrofolate Dehydrogenase (NADP)CholineHomocysteine S-MethyltransferaseNicotinamide N-MethyltransferasePhosphatidylethanolamine N-MethyltransferaseDouble-Blind MethodReference ValuesSarcosine DehydrogenaseVascular DiseasesMethylationGuanidinoacetate N-MethyltransferaseFluorescence Polarization ImmunoassayHematinicsCholine DeficiencyCreatinineVitaminsNeural Tube DefectsChromatography, High Pressure LiquidNutritional StatusRiboflavinMethyltransferasesFerredoxin-NADP ReductaseLiverArteriosclerosisAnalysis of VarianceDose-Response Relationship, DrugTime FactorsEndothelium, VascularAdenosylhomocysteinaseRegression AnalysisFood, FortifiedTranscobalaminsHomozygoteProspective StudiesCoffeeLipidsCholesterolErythrocytesXanthurenatesCross-Over StudiesCross-Sectional StudiesPlasma CellsCoronary DiseaseRenal DialysisHLA-B51 AntigenKidney Failure, Chronicgamma-Glutamyl HydrolaseCaseinsCholesterol, HDLCystathionine gamma-LyaseOxidative StressBeerTriglyceridesRetinal Vein OcclusionMalondialdehydeCoronary Artery DiseaseCohort StudiesPlacebosC-Reactive Protein